Functions
2.12 Unbalanced Load (Negative Sequence) Protection (ANSI 46)
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
97
2.12.3 Settings
2.12.4 Information List
Addr. Parameter Setting Options Default Setting Comments
1701 UNBALANCE LOAD OFF
ON
Block relay
OFF Unbalance Load Protection
1702 I2> 3.0 .. 30.0 % 10.6 % Continously Permissible Current
I2
1703 T WARN 0.00 .. 60.00 sec; ∞ 20.00 sec Warning Stage Time Delay
1704 FACTOR K 1.0 .. 100.0 sec; ∞ 18.7 sec Negativ Sequence Factor K
1705 T COOL DOWN 0 .. 50000 sec 1650 sec Time for Cooling Down
1706 I2>> 10 .. 200 % 60 % I2>> Pickup
1707 T I2>> 0.00 .. 60.00 sec; ∞ 3.00 sec T I2>> Time Delay
No. Information Type of In-
formation
Comments
5143 >BLOCK I2 SP >BLOCK I2 (Unbalance Load)
5146 >RM th.rep. I2 SP >Reset memory for thermal replica I2
5151 I2 OFF OUT I2 is switched OFF
5152 I2 BLOCKED OUT I2 is BLOCKED
5153 I2 ACTIVE OUT I2 is ACTIVE
5156 I2> Warn OUT Unbalanced load: Current warning stage
5158 RM th.rep. I2 OUT Reset memory of thermal replica I2
5159 I2>> picked up OUT I2>> picked up
5160 I2>> TRIP OUT Unbalanced load: TRIP of current stage
5161 I2 Θ TRIP OUT Unbalanced load: TRIP of thermal stage
5165 I2> picked up OUT I2> picked up
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